Face-plate



Oct. 24, 1933. E. A. BAUMBACH 1,931,640

FACE PLATE Filed July so, 1932 s Sheets-Sheet 1 DWI/V701? (#7 15M E. A.BAUMBACH FACE PLATE Filed July 30, 1932 I5 Sheets-Sheet Oct. 24, 1933.

Oct. 24, 1933. I BAUMBACH 1,931,640

FACE PLATE Filed July 50, 1932 :5 Sheets-Sheet '3 Patented Oct. 24, 1933UNITED STATES PATENT oerce Application July 30, 1932. Serial No. 627,027

7 Claims. (01. 82 -40) My invention relatesv to a lathe attachment, andmore. particularly to a two-part face-plate comprising a base face-plateportion attached to the lathe headstock and an auxiliary faceplateportion detachably mounted upon the base face-plate.

In machine-shop practicelarge pieces of workable stock are unwieldytofmanage and diflicult to center and position'on the lathe face-plate.

10 In my invention, however, this handicap has been overcome byarranging to center and position the work on one member of a two-partface-plate and then to transport this one member or auxiliary face-plateporti'on, to which the work is clamped, to the other member or baseface-plate adapted to conveniently receive the auxiliary face-plate.

An object of my invention is to provide improved apparatus forfacilitating the setting'up of bulky and heavy lathe work.

Another object of my invention is to provide a two-part face-plate, onemember of which is readily and conveniently attachable to or detachablefrom the other member. j

A further object of my invention is to provide a convenient means forforcing the aux: iliary face-plate into tight cooperation with the basemember. 7

A still further object of my invention is to provide a convenient meansfor readily locking the auxiliary face-plate portion to the basefaceplate portion.

Another object of my invention is to provide a combined conveying andpositioning means for 35 facilitating the attachment to the base memberof the auxiliary member to-which the'workable stock has been centered,positioned and clamped. 7

Other objects and features will appear from the detailed description andclaims in connec- 40 tion with the accompanying drawings in which thesame reference characters represent like parts throughout, and,in'which:,

Figure 1 is a perspective view of a two-part face-plate and associatedparts;

Fig. 2 isa section on the line 2-2 of 'Fig. 1;

Fig. 3is an elevational view of one portion of the face-plate;

Fig. 4 is an elevational viewof the other portion of the face-plate;

Fig. 5 is an enlarged detail perspective view of co-operating parts ofthe face-plate portions;

Fig. 6 is a view similar to Fig. Sshowing the parts in a differentposition; 7

Fig. 7 is an enlarged detail view; and

Fig. 8 is-an enlarged perspective view of a lifter for the face-plate. IV The construction shown'in the drawings comprises a two-part face plate1, a combination lifter and carriage 2 for the face-plate, a track 3 forthe carriage, and portions of a lathe 4 with which the face-plateco-operates.

The two-part face-plate comprises an inner portion 5 having provisionswhereby it may be readily attached and detached with respect to theheadstock spindle 6 of the lathe, and an outer face-plate portion 7having provisions whereby the Work 8 to be operated on may be readilysecured thereto and also having provisions whereby itmay be readilyattached and detached with respect to the inner face-plate portion '5. j

By making the face-plate in two-parts,' as thus described, the innerpart 5 may be secured and centered with respect to the headstock spindle6., The work 8 to be operated on may be secured and centered withrespect to the, outer face-plate portion 7, and the outer face-plateportion carrying the work secured'thereto may be swung into position tob'e'con'nected to the face-plate portion 5 secured to the headstockspindle 6. ,In order to center the outer face plate portion 7 withrespect to the inner face the act of connecting the face-plate portions.

Inorder toenable heavy workto be handled, I .may'provide a liftercarriage 2 and track3 which will carry the outer face-plate portion atsuch'a height as to bring the outer face-plate portion in" properrelation with respect to the :inner portion as' the carriage 2is'shifted along .the track 3." In securing the outer face-plateportion. to

the carriage, this face-plateportion carrying the work secured theretomay .be stood on edge and the carriagehook 9 slipped into one of theeyes 10 on the face-plate portion, after which the face-plate portioncarrying the work may be lifted clearoi the, support by manipulating thelifting lever 11 which raises the lower book link 12 from the positionshown in dotted lines in Fig. Btothe position shown in full lines, inwhich the-lower link 121s raised and held in no elevated position at aheight to carry the outer face-plate portion into position with respectto the inner face-plate portion.

The quick detachable connection for the twopart face-plate is in thenature of a bayonet joint. It comprises four radiallyextendingwedge-like lugs 13 on the outer face-plate portion '7 whichslip under cooperating overhanging ledges 14 on the inner face-platemember '5 by a "limited movement of rotation as shown in Figs. 3, 4, 5and 6.

A detachable lever 15 may be provided for insuring a firm connectionbetween the two face plate portions 5 and '7, this lever having anopening 16 which enables it to be slipped over the fulcrum-pin 1'7 onthe face-plate portion 5 in such a position that one end .18 of thelever 15 engages a notch 19 in the outer face-plate portion '7 so thatby shifting the handle '20 of the lever 15 to the right as seen in Fig6, a powerful-turning movement may be imparted to the outer face-plateportion '7 to force the wedgelike lugs 13 firmly into engagement withthe overhanging ledges 14" of the inner face-plate portion 5.

In order to hold the two face-plate portions in connected position, alatch member 21 may be provided mounted on a turn-button 22 oscillatablymounted in the inner face-plate portion 7. A leaf spring 23 serves tohold this latchmember 21 in latching position by engaging a flat spot 24on the shank 25 of the turnbutton 22. The outer face-plate portion '7 isprovided with suitable tapped holes 26to facilitate securing the workthereto and may be provided with anumber of'large openings 27 to lightenthe faceplate 7. The innerface-plate portion 5 is provided with acentral tapped opening 28 enabling it to be screwed on theprojectingspindle 6 of the lathe headstock," I

The lifting carriage comprises a lower link 12 having an upperhook-likehead 29,-an upper link 30 having a lower hook-like. head 31,and

, a lifting lever 11' pivotally connected with both heads 29 and 31Iat32 and 33," respectively. H

'In "securing the outer face-plate portion '7 to 't he lifting carriage2, the parts of the lifting carriage are first placed in the dotted lineposition shown in ,Fig. 8. I The outer face-plate portion '7 is hookedinto the depending hook 9, and the lever isthen shifted from the dottedline position to the full line position lifting the piv- 'ot'al 1-point32 of the hook-like head 29 from the dotted line-position tothe fullline position "and raising the face-plate portion? andfthe work 8carried thereby tofenable' the carriage 2 to be rolled along to bringthe outer face-plate portion '7 into proper relation with respect to theinner face-plate portion 5. The inner faceplate portion 5 may thenbegiven a slight movement of rotation either by, starting up the motororby turning the headstock by hand to cause "the the proper engagementof the overhang- The use of the apparatus has been outlined inconnection with the description of 'the construction. Briefly, the outerface-plate portion "7 may loeplaced on a suitable support and the work 8to be operated on secured thereto. The

face-plate '7, carrying the work, '"may then "be tipped up on-edge, thehook 9 secured to the of the turn-button 22.

eye 10 of the face-plate portion '7, and the faceplate portion carryingthe work 8 lifted clear of the support by operating the lever. Thecarriage 2 may then be rolled along the track 3 to bring the outer faceplate portion '7 into proper position with respect to the innerface-plate portion 5, and the two face-plate portions 5 and '7 securedtogether by ment described. I v

The face-plate portions may be forced into final position by means ofthe hand lever 20 and the face-plate '7 then securely latched by meansThis operation acurately centers the work with respect to the headstockspindle, as the two face-plate portions 5 and '7 are {accuratelycentered with respect to each other, the inner face plate portion 5 isaccurately positioned with the head stock spindle, and the work 8 isaccurately positioned on the outer face-plate portions. This greatlyfacilitates the operation of s'ecuring and centering the work 8with-respect to the face-plate, particularly if the work to be operatedon is heavy and awkward to handle. If desired,' an adjustment may beprovided as indicated at 34'to vary the effective length of the lowerlink. Y

'Further modifications will be apparent to those skilled in the art, andit is desired,'therefore,that my invention'be limited only by the.

the bayonet joint moveprior art and the scope of the appended claims.

Having thus described my invention, what 13 claim and desire to secureby Letters Patent is: l. A two-partiace-plate comprising a base member,a demountable auxiliary member provided with means for slidably lockingonto said base member, a-plurality" of -pivot studs on said basemember,- said auxiliary member being provided with a pluralityof-recesses along its edge substantially coinciden't with said-studs,and a lever pivotally mounted on one :of said studs and engaging saidrecesses for tightening to and loosening from said base member the saidauxiliary member."

2. A two-part face-plate for use with a lathe, comprising an innerface-plate portion having provisionsnvhereby it maybe secured to rotatewith the spindle of the latheheadstockandan outer face-plate portionhaving provisionswhereby .the work to be operated on may be securedthereto, said inner and .outerportions having C telescoping andswiveling interengaging means for centering them and providing forrelative swiveling movement, and being also provided withcircumferentially spaced interlocking means positionedradially outsidesaid telescoping and swiveling interengagingmeans and movable intointerlocking position by said swiveling movement.

3. A two-part face plate for use with a lathe,

comprising an inner face-plate portion having provisions whereby it maybe secured to rotate with the spindle of the lathe headstock and anouter face ,plate portion having provisions where'- by the work to beoperatedfbn may besecured thereto, .said inner jand outer portionshaving telescoping and swiveling interengaging means for centering themand providing forrelative swiveling movement and being also providedwith circumferentially spaced interlocking wedging means positionedradially outside said telescoping and swiveling interengaging means-andmovable into interlocking position by saidswiveling-movement.

4. A two-part face-platle for use with a lathe comprising 'an inner"face-plate portion having 1 provisions whereby it may be secured torotate with'the spindle of the lathe headstock, an outer face-plateportion having provisions whereby the work to be operated on may besecured thereto, said face-plate portions having means whereby they maybe readily attached, detached, and centered with respect to each otherwhereby the inner face-plate portion may be secured in proper positionwith respect to the headstock spindle, the work to be operated on may besecured to the outer face-plate portion, and the outer face-plateportion carrying the work to be operated on may be readily centered andsecured in position on the inner face-plate portion, said meanscomprising a bayonet joint connection between the face-plate portions,and means for locking said inner and outer portions against swivelingmovement to hold the bayonet joint in locked position.

5. A two-part face-plate for use with a lathe, comprising an innerface-plate portion having provisions whereby it may be secured to rotatewith the spindle of the lathe headstock and an outer face plate portionhaving provisions where by the work to be operated on may be securedthereto, said inner and outer portions having telescoping and swivelinginterengaging means for centering them and providing for relativeswiveling movement and being also provided with circumferentially spacedinterlocking wedging means positioned radially outside said telescopingand swiveling interengaging means and movable into interlocking positionby said swiveling movement, and means for locking said inner and outerportions against swiveling movement to hold the bayonet joint in lockedposition.

6. A two-part face-plate for use with a lathe comprising an innerface-plate portion having provisions whereby it may be secured to rotatewith the spindle of the lathe headstock, and an outer face-plate portionhaving provisions whereby the work to be operated on may be securedthereto, said face-plate portions having means whereby they may bereadily attached, detached, and centered with respect to each otherwhereby the inner face-plate portion may be secured tion snugly againstthe inner face-plate portion.

'7. A two-part face-plate for use with a lathe comprising an innerface-plate portion having provisions whereby it may be secured to rotatewith the spindle of the lathe headstock, an outer face-plate portionhaving provisions whereby the work to be operated on may be securedthereto, said face-plate portions having means whereby they may bereadily attached, detached, and centered with respect to each otherwhereby the inner face-plate portion may be secured in proper positionwith respect to the headstock spindle, the work to be operated on may besecured to the outer face-plate portion, and the outer face-plateportion carrying the work to be operated on may be readily centered andsecured in position on the inner face-plate portion, said -meanscomprising a bayonet joint connection between the face-plate portions,having provisions for drawing the outer face-plate portion snuglyagainst the inner face-plate portion, and means for locking said innerand outer portions against swivelling movement to hold the bayonet jointin locked position and to retain the outer faceplate portion snuglyagainst the inner face-plate portion.

EMIL A. BAUMBACH.

